Tamper and like impact tool



May 12, 1925. 1,535,304

C. JACKSON TAMI-ER AND LIKE IMPACT TOOL Filed Sept. 13, 1924 2 Sheets-Sheet 1 I Ii I :1 5 1 7 H: l ,7

i 1 31 I l -IE- Z3 22 I INVENTOR 1 g l, 24 Cora/0d dackso/L 5 24 ll 7 l May 12., 1925.

' C. JACKSON Y'IAMPER AND LIKE IMPACT TOOL Filed Sept. 15, 1924 2 Sheets-Sheet 2 mm m Nm R TC O 1/0 mm A M Patented May 12, 1925.

CORWILL JACKSON, OF CHICAGO, ILLINOIS.

TAMPER AND LIKE IMPACT TOOL.

Application filed September 13, 1924. Serial No. 737,582.

To all whom it may concern:

' Be it known that I, ConwILL JACKSON, a citizen of the United States, residing at Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Tampers and like Impact Tools, of which the following is a specification.

This invention relates to improvements in tampers and like impact tools.

My improved tampers are especially designed by me for use as tie tampers and I have illustrated the same as embodied for that purpose, although my improvements are readily adapted and desirable for use in various other relations, for instance, ramming molds and compacting various materials.

- The main objects of this invention are:

First, to provide an improved tamper which is well adapted to withstand severe usage such as track work.

Second, to provide an improved tamper which can be readily disassembled and reassembled by unskilled persons should occasion require.

Third, to provide an improved tamper including an electric motor in which the motor is effectively protected.

Objects pertaining to details and economics of construction and operation of my invention will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A-structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this application, in which:

Fig. I is a side view of a tamper embodythe features of my invention.

ig. II is a fragmentary plan view.

Fig. III is a detail view mainly in vertical section on a line corresponding to line 3-3 of Fi II.

Fig. IV'is a side elevation of the housing and motor shaft with the parts mounted thereon disassembled.

Fig. V is a detail section on a line corre sponding to line 55 of Fig. II.

In the drawing the sectional views are taken looking in the direction of the little arrows at the ends of the section lines and tion or member 1 and a top section or memher 2. The bottom section is shouldered at 3 to receive the top section. The housing members 1 and 2 have opposed lugs 4 and 5, respectively, adapted to receive the coupling bolts 6.

The housing members have opposed bearing boxes or recesses 7 and 8, these bearing boxes being provided with annular lubricant collecting grooves 9 adjacent their inner ends. Passages 10 lead from these grooves to the outside of the housing for the discharge of oil collected in the grooves.

Lubricant feed reservoirs 12 are formed in the housing members, these reservoirs being connected to the bearing boxes by means of the ports or passages 13. These oil reservoirs are provided with closure plugs 14.

The motor field designated generally by the numeral 15 is mounted in the top member of the housing, this'top member being shouldered at 16 to receive this field, supportingrings 17 being provided for the field so that the field constitutes an assembled unit with the top housing member, that is, when the top housing member is removed the field is supported and removed therewith.

The armature 18 is mounted on the shaft 19, this shaft having bearings 20 and 21 .mounted thereon and supported when the housing members are assembled in the boxes 7 and 8, respectively. The shaft is provided with oil flanges 22 which are mounted thereon so that when the parts are assembled, these flanges are in the plane of the oil grooves.

An unbalancing weight 23 is mounted on the lower end of the shaft. The armature, the unbalancing weight and the bearings are all so secured to the shaft that they constitute a unit when the parts are disassembled as shown in Fig. IV, the top housing member having assembled therewith as a unit the field of the motor.

The bottom housing member is provided with feet or lugs 24 on which the tool or tamper bar 25 is rigidly secured by means of the bolts 26. The handle bar 27 is resiliently connected to the housing by means of the resilient arms 28 and 29, the arm 28 being of general 8 shape and being formed as a leaf spring. Its heavier end 30 is lapped under the under side of the tool and secured to the housing by means of bolts 26.

The spring arms 28 and 29 have eyes at their outer ends which are engaged with bolts 31 carried by clips 32 on the handle bar. The inner end of the spring arm 29 is provided with an eye 33 which engages the bolt 34 carried by the upwardly projecting lugs 35 on the top member of the housing. These lugs also carry the U-shaped grip or handle 36, the same being rigidly secured to the lugs by. means of the bolt 34.

The top member of the housing has an enlargement or extension 37 whichfacilitates connecting the cable 38 to the coils of the motor.

With the parts thus formed and arranged, the motor is effectively protected and is so supported within the housing that it is well adapted to withstand the vibrations produced by the unbalancing weight. The parts are also very easily assembled and disassembled and may be readily disassembled on the job should occasion require, and this by persons not specially skilled.

The bearings may be kept well lubricated without subjecting the motor to an objectionableamount of lubricant. The handle bar 27 is provided with a rounded head piece 39 at its upper end so that the operator may grasp the right bar with the right hand and press down on' this rounded head with the left hand. y 1

The manner of using my improved tamper is illustrated in my Letters Patent No.

1,320,049, issued J anuary27, 1920, my present improvement being anadaptation and, in some respects, an improvement upon the structure there illustrated.

Having thus described my invention what I claim as new and desire to secure by Let-, .ters"'-Patent is:

'1, In a structure of the class described,- the comb1nat1on of a housing comprising detachably connected top and bottom mem-..

bers having opposed bearing boxes in their ends, said bearing boxes'having annular oil grooves adjacent the inner ends thereof,- there being discharge passages leading from.

said grooves to the outside of the housing, said housing members li'aving lubricant feed reservoirs therein opening to said bearing boxes, a motor field unit mounted in said top housing member and constituting therew th anassembled unit, a shaft, berin s for said shaft removably engaged in said earing boxes, said shaft being provided with oil retaining flanges disposed in the planesof said oil grooves, an armature mounted on said shaft, an unbalancing weight mounted on the lower end of said shaft, said shaft, bearings, armatureandunbalancing weight constituting an assembled unit said bearing boxes removable when said housing members are disconnected, a tool mounted on said bottom housing member, and a handle bar having a resilient connection to said housing.

2. In 'a structure of the class described, the combination of a housing comprising detachably. connected top and bottom members having opposed bearing" boxes in their ends, a motor field unit mounted insaid top housing member and constituting therewith an assembled unit, a shaft, bearings for said shaft removably engaged in said bearing boxes, an armature mounted on said shaft, an unbalancing weight mounted on the lower end of said shaft, said shaft, bearings, armature and unbalancing weight constituting an assembled unit removable when said housing members are disconnected, a tool mounted on said bottom housing member, and a handlebar having a resilient connection to said housing.

3. In a structure of the combination of a housing comprising detachably connected top and bottom members having opposed'bearin boxes in their ends, aving annular oil grooves adjacent the inner ends thereof, there being discharge passages leading from said grooves to the outside of the housing,

class described, the

said housinglmembers having lubricant feed resenvoirs t erein opening to said bearing boxes, a motor field unit mounted in said top housing member and constituting therewith an assembled unit, a shaft, bearings for said shaft removably engaged in said bearing boxes, said shaft being provided with oil retaining flanges disposed in the planes of said oil grooves, and mounted on said shaft, said shaft, bearings and armature constituting an assembled unit removable when said housing members are disconnected.

4. In a structure of the class described,

an armature a motor field un'it mounted in said top housing member and constituting therewith an assembled unit, a shaft, bearings for said shaft removablj engaged in said bearing boxes, and an armature mounted on said shaft, -said shaft, bearings and armature constituting an assembled unit removable when said housing members are disconnected. I

5. In a structure of the class described, the combination of a housing comprising detachably connected top and bottom members having opposed bearing boxes in'their ends, said bearlng boxes having annular oil grooves adjacent the inner ends thereof, there being discharge passages leading froin said grooves to the outside of the housing, a motor field unit mounted in said housingg'a said bearing boxes, said shaft being provided with oil retaining flanges disposed in the, planes of said oil grooves, an armature mounted on said shaft, an unbalancing weight mounted on said shaft, a tool lllOlllLh ed on said bottom housing member, and a handle bar having a resilient connection to said housing.

6. In a structure of the class described.

the combination of a housing comprising detachably connected top and bottom mem-- bers having opposed bearing boxes in their ends, a motor field unit mounted in said housing, a shaft, bearings for said shaft disposed in said bearing boxes, an armature mounted on said shaft, an unbalancing weight mounted on said shaft, a tool mounted on said shaft, a tool mounted on said bottom housing, and a handle bar having a resilient connection to said housing.

7. In a structure of the class described, the combination of a housing comprising detachably connected too and bottom men1- bers having opposed bearing boxes in their ends, said bearlng boxes having annular oil grooves adjacent the inner ends thereof, there being discharge passages leading from said grooves to the outside of the housing, a motor field unit mounted in said housing, a shaft, bearings for said shaft disposed in said bearing boxes, said shaft being provided with oil retaining flanges disposed in the planes of said oil grooves, and an armature mounted on said shaft.

8. In a structure of the class described, the combination of a housing comprising top and bottom members, the bottom member being shouldered to receive the .top member, said members having opposed coupling lugs on their meeting edges and opposed bearing boxes in their ends, a motor field unit mounted in said housing, a shaft. bearings for said shaft removably engaged in said bearing boxes, an armature mounted on said shaft, an unbalancing weight mounted on said shaft, said. shaft, bearings armature and unbalancing Weight constituting an assembled unit removable when said housing members are disconnected, a tool mounted on said housing, and a handle bar having a resilient connection to said hous- 1n In a structure of he class described. the combination of a housing comprising top and bottom members, the bottom member being shouldered tol receive the top member, said members having opposed coupling lugs on their meeting edges and opposed bearing boxes in their ends, a motor field unit mounted in saidhousing, a shaft. bearings for said shaft removably engaged in said bearing boxes, an armature mounted on said shaft, and an unbalancing weight mounted on said shaft, said shaft, bearings, armature and unbalancing weight constituting an assembled unit removable when said housing members are disconnected.v

10. In a structure of the class described, the combination of a housing comprising top and bottom members having oppose bearing boxes in their ends, a motor field unit mounted in said top housing member and constituting therewith an assembled unit, a shaft, bearings for said shaft removably engaged in said bearing boxes, an armature mounted on said shaft, an unbalancing, weight mounted on said shaft, said shaft, bearings, armature and unbalancing weight constituting an assembled unit removable when said housing members are disconnected, a tool carried by said housing, and a handle bar having a resilient connection to said housing.

11. In a structure of the class described, the combination of a housing comprisin top and bottom members having oppose bearing boxes in their ends, a motor field unit mounted in said top housing member and constituting therewith an assembled unit, a shaft, bearings for said shaft removably engaged in said bearinglmoxes, an armature mounted on said shaft, and an unbalancing weight mounted on said shaft, said shaft, bearings, armature and unbalancing weight constituting an assembled unit removable when said housing members are disconnected.

12. In a structure of the class described, the combination of a housing comprising detachably connected top and bottom members having opposed bearing boxes in their ends, a motor field unit mounted in said top housing member and constituting therewith an assembled unit, a shaft, bearings for said shaft removably engaged in sald bearing boxes, an armature mounted on said shaft, an unbalancing weight mounted on the lower end of said shaft, said shaft, bearings, armature and unbalancing weight constituting an assembled unit removable when said housing members are disconnected, a tool secured to said bottom housing member, a handle bar provided with a rounded head at its upper end, and a pair of resilient su porting arms for said handle, one of said supporting arms being rigidly mounted on said bottom section and the other being pivotally connected to the top section and to the upper end of said handle, and a baillike grip on said top section.

13. In a structure of the class described, the combination of a housing comprising detachably connected top and bottom members having opposed bearing boxes in their ends, a motor field unit mounted in said top housing member and constituting therewith an'assem'bled unit, a shaft, bearings for said shaft removably engaged in. said bearing boxes, an armature mounted on said shaft, an unbalancing weight mounted on said housing members are disconnected, a-

tool secured to said bottom housing member, a handle bar provided with a rounded head at its upper end, and a air of resilient supporting arms for said andle, one of said su orting arms being rigidly mounted on said iiottom section and the other being pivotally. connected to the to section and to the upper end of said hand e.

14. In a structure of the class described, the combination of a housing comprising detachably connected top and bottom members having opposedbearing boxes in their ends, a motor field unit mounted in said top housing member and constituting therewith an assembled unit, a shaft, bearings for said shaft removably engaged in said bearing boxes, an armature mounted on said shaft, and an unbalancing weight mounted on the lower end of said shaft, said shaft, bearings, armature and unbalancing weight constituting an assembled unit removable when said housingmembers are disconnected.

In witness whereof I have hereunto set my hand 'CORWILL JACKSON. a 5. 

